CN215007638U

CN215007638U - Snow-proof self-cleaning cable

Info

Publication number: CN215007638U
Application number: CN202120272301.5U
Authority: CN
Inventors: 邹瑞军; 生长飞; 张润浩; 郭林鑫; 张晴; 张琛楠; 李金堂
Original assignee: Zhejiang Wanma Co Ltd
Current assignee: Zhejiang Wanma Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-12-03
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses a snow-proof automatically cleaning cable, including the sinle silk, the sinle silk outside is provided with the zone of heating, be provided with temperature measurement optic fibre in the zone of heating, the zone of heating outside is provided with the protective layer. By arranging the heating layer and the temperature measuring optical fiber in the cable, when the temperature of the cable is reduced to a preset temperature, the temperature measuring optical fiber feeds back a signal to enable the heating layer to heat the whole cable, so that an ice layer is prevented from being formed on the surface of the cable, the working environment of the cable is optimized, and the service life of the cable is prolonged; the snow prevention layer with the hydrophobic characteristic can cooperate with the heating layer to work, after the heating layer heats up the cable surface, snow on the surface of the cable melts into water, and the water can unload dust on the cable surface due to the hydrophobic effect of the snow prevention layer. Impurities such as bird droppings are separated from the cable, so that the cable is cleaned, and the self-cleaning effect of the cable is achieved.

Description

Snow-proof self-cleaning cable

Technical Field

The utility model belongs to the technical field of the cable technique and specifically relates to a snow protection automatically cleaning cable is related to.

Background

Aerial cables have poor working conditions and are susceptible to environmental conditions such as ice, wind, rain, snow, temperature, chemical corrosion, lightning, etc.

The cable is overhead outdoors, and the surface is easily covered with snow and ice. When the weight of the ice layer exceeds the bearing capacity of the electric wire and the electric cable, the phenomena that the electric power tower or the electric pole is pulled by the cable and the cable breaks are easily caused.

For example, a snow-proof electric wire and cable disclosed in the chinese patent document, whose publication number "CN 207909555U" includes a conductor and an insulating layer wrapped outside the conductor, a positioning layer is disposed outside the insulating layer, and a plurality of gravity rods uniformly distributed are disposed in the left and right sides of the lower portion of the positioning layer; the positioning layer is externally provided with a snow-proof layer; the central positions of the upper surface and the lower surface of the snow-proof layer are respectively provided with a snow groove and a snow discharge groove; the left side and the right side of the snow-proof layer are provided with a plurality of mutually symmetrical snow-discharging flow passages; the upper end and the lower end of the snow discharge flow passage are respectively provided with a snow conveying flow passage and a snow outlet flow passage; the snow discharge runner is communicated with the snow groove through the snow feeding runner, and the snow discharge runner is communicated with the snow groove through the snow discharge runner; the snow conveying flow channel is in a horn shape with a wide upper part and a narrow lower part. However, the snow-proof layer of the cable cannot completely drain away the accumulated snow adhered to the cable, and the accumulated snow may still form an ice layer on the cable after the temperature drops, which affects the service life of the cable.

Disclosure of Invention

To cable surface snow can't arrange the problem that easily forms ice sheet influence cable life completely among the prior art, the utility model provides a snow-proof automatically cleaning cable through built-in zone of heating and temperature measurement optic fibre in the cable, temperature measurement optic fibre feedback signal makes the zone of heating to cable whole when the cable temperature reduces to predetermineeing the temperature heat, avoids cable surface to form the ice sheet to optimize cable operational environment, promote cable life.

The utility model provides a snow-proof automatically cleaning cable, includes the sinle silk, the sinle silk outside is provided with the zone of heating, be provided with temperature measurement optic fibre in the zone of heating, the zone of heating outside is provided with the protective layer. The ice is one of a few substances which can be adhered to most materials including most known polymers, the temperature measuring optical fiber is used for monitoring the temperature of the whole cable, when the temperature is reduced to be below zero degree, in order to avoid icing on the surface of the cable, the temperature measuring optical fiber sends a starting signal to an electric signal switch at the end part of the heating layer, the electric signal switch can adopt a triggering device such as a relay, the electric signal switch starts the heating layer to heat up, the temperature of the cable is ensured to be maintained above zero degree, and therefore the formation of an ice layer on the surface of the cable is avoided; at the moment, if snow exists on the cable, the cable after temperature rise can melt and fall off the snow, and further the phenomenon that the cable is stretched and even broken due to the snow layer or the ice layer formed on the cable is avoided.

Preferably, the protective layer is provided with a snow-proof layer on the outer side, and the snow-proof layer is a hydrophobic layer. The anti-snow layer is formed by coating a commercially available anti-snow coating on the surface of the protective layer, the anti-snow coating adopts IPN technology, and organic polymers are modified by silicon-containing inorganic polymers to obtain a multi-block copolymer formed by alternate arrangement, so that the mechanical properties of the coating, such as adhesion, hardness and the like, are improved. At the same time, the coating surface exhibits a low surface energy. Special surface active substances and nano rare earth oxides are added, and the coating has the comprehensive properties of low surface energy, high corrosion resistance, large bonding force with a substrate, resistance reduction, wax precipitation prevention and the like through the interaction and synergistic effect of the components. Can prevent ice and snow from adhering, and has the composite functions of corrosion resistance, wear resistance, aging resistance, surface self-cleaning and the like. The cable surface can form a thin hydrophobic molecular layer with special orientation on the cable surface, which is substantially equivalent to building a layer of separation film between a protected surface and ice crystals (even if the protected surface is modified), the hydrophobic layer can work in cooperation with a heating layer, when the heating layer heats the cable surface, snow on the surface is melted into water, and the water can unload dust on the cable surface due to the hydrophobic effect of the snow-proof layer. Impurities such as bird droppings are separated from the cable, so that the cable is cleaned, and the self-cleaning effect of the cable is achieved.

Preferably, the heating layer is woven from carbon fibers. The heating layer is formed by spirally winding and weaving a carbon fiber heating body, and the cable is heated by utilizing the characteristic of carbon fiber heating after being electrified, so that the surface temperature of the cable is increased, and the ice and snow removing effect is achieved. The electric heating conversion efficiency of the carbon fiber electric heating body is improved by 30% compared with that of metal heating, the electric heating efficiency is about 100%, the carbon fiber electric heating body is light in weight and resistant to stretching, and meanwhile, the chemical property is stable, and the working stability of the cable can be guaranteed.

Preferably, an insulating layer is arranged between the wire core and the heating layer, and the insulating layer is a cross-linked polyethylene part. The crosslinked polyethylene has the properties of net-shaped and body-shaped structures, the heat resistance of the crosslinked polyethylene is enhanced along with the increase of the crosslinking degree, the relative thermal elongation is correspondingly reduced, the long-term working temperature of the crosslinked polyethylene can be increased to 90 ℃, the sustainable instantaneous short-circuit temperature can reach 170 ℃ and 250 ℃, and the heat generated by the cable current can be fully borne.

Preferably, the temperature measuring optical fiber is embedded and connected with the heating layer. Because the utility model discloses a cable adopts temperature measurement optic fibre as temperature sensing device for long distance overhead cable, possesses good long distance temperature monitoring ability.

Preferably, the protective layer is made of polytetrafluoroethylene. The polytetrafluoroethylene protective layer has high-temperature and low-temperature resistance, can be used at-180-260 ℃ for a long time, and ensures the temperature change resistance of the cable. And the paint has the advantages of high and low temperature resistance, corrosion resistance, excellent electrical insulation, aging resistance, small water absorption and excellent self-lubricating property.

Preferably, the thickness of the snow-proof layer is 20 μm to 50 μm. The snow-proof layer is suitable for various coating methods, can be self-cured at normal temperature, can form a coating with the thickness of 20-50 mu m, preferably 30 mu m on the protective layer, and can also have the composite functions of ice and snow adhesion prevention, corrosion resistance, surface self-cleaning and the like.

Therefore, the utility model discloses following beneficial effect has: (1) by arranging the heating layer and the temperature measuring optical fiber in the cable, when the temperature of the cable is reduced to a preset temperature, the temperature measuring optical fiber feeds back a signal to enable the heating layer to heat the whole cable, so that an ice layer is prevented from being formed on the surface of the cable, the working environment of the cable is optimized, and the service life of the cable is prolonged; (2) the snow-proof layer can prevent ice and snow from adhering and has the composite functions of corrosion resistance, wear resistance, aging resistance, surface self-cleaning and the like; (3) the snow prevention layer with the hydrophobic characteristic can cooperate with the heating layer to work, after the heating layer heats up the cable surface, snow on the surface of the cable melts into water, and the water can unload dust on the cable surface due to the hydrophobic effect of the snow prevention layer. Impurities such as bird droppings are separated from the cable, so that the cable is cleaned, and the self-cleaning effect of the cable is achieved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

In the figure: 1-wire core, 2-insulating layer, 3-heating layer, 4-temperature measuring optical fiber, 5-protective layer and 6-snow-proof layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

As shown in fig. 1 and 2, the snow-proof self-cleaning cable comprises a wire core 1, wherein a heating layer 3 is arranged outside the wire core, a temperature measuring optical fiber 4 is arranged in the heating layer, and a protective layer 5 is arranged outside the heating layer. The protective layer is a polytetrafluoroethylene product. The ice is one of a few substances which can be adhered to most materials including most known polymers, the temperature measuring optical fiber is used for monitoring the temperature of the whole cable, when the temperature is reduced to be below zero degree, in order to avoid icing on the surface of the cable, the temperature measuring optical fiber sends a starting signal to an electric signal switch at the end part of the heating layer, the electric signal switch can adopt a triggering device such as a relay, the electric signal switch starts the heating layer to heat up, the temperature of the cable is ensured to be maintained above zero degree, and therefore the formation of an ice layer on the surface of the cable is avoided; at the moment, if snow exists on the cable, the cable after temperature rise can melt and fall off the snow, and further the phenomenon that the cable is stretched and even broken due to the snow layer or the ice layer formed on the cable is avoided. The polytetrafluoroethylene protective layer has high-temperature and low-temperature resistance, can be used at-180-260 ℃ for a long time, and ensures the temperature change resistance of the cable. And the paint has the advantages of high and low temperature resistance, corrosion resistance, excellent electrical insulation, aging resistance, small water absorption and excellent self-lubricating property.

The protective layer outside is provided with anti-snow layer 6, anti-snow layer is the hydrophobic layer. The anti-snow layer is formed by coating a commercially available anti-snow coating on the surface of the protective layer, the anti-snow coating adopts IPN technology, and organic polymers are modified by silicon-containing inorganic polymers to obtain a multi-block copolymer formed by alternate arrangement, so that the mechanical properties of the coating, such as adhesion, hardness and the like, are improved. At the same time, the coating surface exhibits a low surface energy. Special surface active substances and nano rare earth oxides are added, and the coating has the comprehensive properties of low surface energy, high corrosion resistance, large bonding force with a substrate, resistance reduction, wax precipitation prevention and the like through the interaction and synergistic effect of the components. Can prevent ice and snow from adhering, and has the composite functions of corrosion resistance, wear resistance, aging resistance, surface self-cleaning and the like. The cable surface can form a thin hydrophobic molecular layer with special orientation on the cable surface, which is substantially equivalent to building a layer of separation film between a protected surface and ice crystals (even if the protected surface is modified), the hydrophobic layer can work in cooperation with a heating layer, when the heating layer heats the cable surface, snow on the surface is melted into water, and the water can unload dust on the cable surface due to the hydrophobic effect of the snow-proof layer. Impurities such as bird droppings are separated from the cable, so that the cable is cleaned, and the self-cleaning effect of the cable is achieved. The thickness of the snow-proof layer is 20-50 μm. The snow-proof layer is suitable for various coating methods, can be self-cured at normal temperature, can form a coating with the thickness of 20-50 mu m, preferably 30 mu m on the protective layer, and can also have the composite functions of ice and snow adhesion prevention, corrosion resistance, surface self-cleaning and the like.

The heating layer is woven by carbon fibers. An insulating layer 2 is arranged between the wire core and the heating layer, and the insulating layer is a cross-linked polyethylene part. The heating layer is formed by spirally winding and weaving a carbon fiber heating body, and the cable is heated by utilizing the characteristic of carbon fiber heating after being electrified, so that the surface temperature of the cable is increased, and the ice and snow removing effect is achieved. The electric heating conversion efficiency of the carbon fiber electric heating body is improved by 30% compared with that of metal heating, the electric heating efficiency is about 100%, the carbon fiber electric heating body is light in weight and resistant to stretching, and meanwhile, the chemical property is stable, and the working stability of the cable can be guaranteed. The crosslinked polyethylene has the properties of net-shaped and body-shaped structures, the heat resistance of the crosslinked polyethylene is enhanced along with the increase of the crosslinking degree, the relative thermal elongation is correspondingly reduced, the long-term working temperature of the crosslinked polyethylene can be increased to 90 ℃, the sustainable instantaneous short-circuit temperature can reach 170 ℃ and 250 ℃, and the heat generated by the cable current can be fully borne.

The temperature measuring optical fiber is embedded and connected with the heating layer. The utility model discloses a cable is long distance overhead cable, adopts temperature measurement optic fibre as temperature sensing device, possesses good long distance temperature monitoring ability.

In the embodiment, the cable meets the product performance requirements of GB/T12527-2008 'rated voltage 1kV and below overhead insulated cable'; the wire core adopts 8000 series aluminum alloy conductors which accord with the ASTM B800-2005 standard; the temperature measuring optical fiber meets the GB/T9771-. When the cable normally works, when the cable is covered by snow, the surface temperature is reduced to be below zero, the temperature measuring optical fiber sends an electric signal, the electric signal switch at the end part of the cable starts the heating layer to heat, the temperature of the surface of the cable gradually rises to be above zero, the snow or the ice layer on the surface of the cable begins to melt, and due to the fact that the snow-proof layer has the hydrophobic characteristic, pollutants on the surface of the cable, such as dust, bird feces and other corrosive impurities, leave the cable under the flowing effect of molten water, and self-cleaning of the cable is achieved. When the temperature is kept above zero within the preset time, the electric signal fed back by the temperature measuring optical fiber enables the electric signal switch to reset, the heating layer stops working and is turned on or off at any time, and electric energy waste is avoided.

In addition to the above embodiments, the technical features of the present invention can be re-selected and combined within the scope of the present invention as disclosed in the claims and the specification to constitute new embodiments, which can be realized by those skilled in the art without any creative work, therefore, the embodiments of the present invention not described in detail should be regarded as specific embodiments of the present invention and within the protection scope of the present invention.

Claims

1. The utility model provides a snow-proof automatically cleaning cable, includes the sinle silk, characterized by, the sinle silk outside is provided with the zone of heating, be provided with temperature measurement optic fibre in the zone of heating, the zone of heating outside is provided with the protective layer.

2. The snow-proof self-cleaning cable according to claim 1, wherein a snow-proof layer is provided outside the protective layer, and the snow-proof layer is a hydrophobic layer.

3. The snow protection self-cleaning cable of claim 1, wherein the heating layer is woven from carbon fibers.

4. The snow-proof self-cleaning cable as claimed in claim 1, wherein an insulating layer is disposed between the core and the heating layer, and the insulating layer is made of cross-linked polyethylene.

5. The snow-proof self-cleaning cable according to claim 1, wherein the temperature measuring optical fiber is embedded in the heating layer.

6. A snow-proof self-cleaning cable as claimed in any one of claims 1 to 5, wherein the protective layer is of polytetrafluoroethylene.

7. A snow-proof self-cleaning cable as claimed in claim 2, wherein the snow-proof layer is 20 μm to 50 μm thick.